This report studies sales (consumption) of Portable Navigation Device in United States market, focuses on the top players, with sales, price, revenue and market share for each player, covering
TomTom
Garmin
Magellan
...

Split by product types, with sales, revenue, price, market share and growth rate of each type, can be divided into
Type I
Type II
Type III
Split by applications, this report focuses on sales, market share and growth rate of Portable Navigation Device in each application, can be divided into
Application 1
Application 2
Application 3